Extension and Native App are once again not the same version

[winteriscariot]

Same issue as #620

It seems that shortly after the 2.13.2 extension update was approved for AMO, the native client extension in the Arch Linux repos was updated to 2.13.3, once again creating a mismatch between extension and native version.

Is it possible to not release the updated native client until the AMO release has been approved by Mozilla so as to avoid this disconnect? It seems like the release to Arch repos is much faster than Mozilla's AMO approval process.